Applies to: AIO-6 (LTE/Max), AIO-5 Lite, AIO-5 Play (BMW/Standard), and related CHIGEE displays
What you need: Your device or the original packaging

Quick Answer (most users)

On the display:
Settings → About → → Serial Number (SN)

All Ways to Locate the SN

1) On the Device (recommended)

• AIO-6 / AIO-5 series:
  Open Settings → About and look for Serial Number.

2) In the CHIGEE GO App (LTE / camera models)

• Open CHIGEE GO → Me → My Device → Serial Number.
  
• If multiple devices are paired, confirm you selected the correct unit.

3) On the Physical Labels

• Retail box: Printed on the outer barcode label.